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some questions about Type 3 Compensation for dc-dc (Read 9607 times)
waseda-rfic
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some questions about Type 3 Compensation for dc-dc
Oct 17th, 2010, 5:51am
 
the Type 3 Conventional Operational Amplifier Compensation introduce 3 poles and 2 two zreos. it uses 2 pole to Compensate two zeros in dc-dc and uses 2 zeros to Compensate poles in dc-dc .
I want to ask two questions:
1. when design the Compensation  circuit , the operational amplifier has its own poles and zeros besides the 3 poles and 2 two zreos, how to do with the poles and zeros of the operational amplifier.
2. there are two  pole-at-zero when the dc-dc is Compensated. the  pole-at-zeros have bad effect on transient response of the loop. whether the two  pole-at-zero have bad effect on transient response of the loop.?
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raja.cedt
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Re: some questions about Type 3 Compensation for dc-dc
Reply #1 - Oct 21st, 2010, 2:54am
 
hi,
whatever be the poles and zero location of your op-amp if they are well beyond UGB then fine.

Thanks.
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waseda-rfic
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Re: some questions about Type 3 Compensation for dc-dc
Reply #2 - Nov 1st, 2010, 6:35pm
 
raja.cedt wrote on Oct 21st, 2010, 2:54am:
hi,
whatever be the poles and zero location of your op-amp if they are well beyond UGB then fine.

Thanks.

Thanks! but the main pole of the OPA is usually several hundred Hz, so it is hard to beyond the poles and zero location I need in the dc-dc
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Lex
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Re: some questions about Type 3 Compensation for dc-dc
Reply #3 - Dec 7th, 2010, 11:54pm
 
from a quick google-search this pops up:
http://designtools.analog.com/dt/stability/stability.html
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« Last Edit: Dec 8th, 2010, 6:54pm by Forum Administrator »  
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